<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <!-- 显示时的作用和div一样，但是它们有自己的语义 -->
    <header>头部标签</header>
    <main>主体部分</main>
    <footer>页脚</footer>
    <!-- 
        controls 让视频标签出现控制条
        autoplay 让视频自动播放
     -->
    <video controls autoplay src="https://ksv-video-publish.cdn.bcebos.com/cfcbe0b4462d1ec9b0272d56bc9fc27cdb3bb853.mp4?auth_key=1639985777-0-0-60c43c42c442b65f1b5b26d03670c979"></video>
</body>
</html>